andeea cavalli



(No Model.)

G. A. GAVALLI. NAIL 03 RIVET FOR BOOTS OR SHOES. No. 382,072. PatentedMay -1, 1888,

InUEnmr:

Witnesses:

UNITED STATES PATENT OFFICE.

G. ANDREA CAVALLI, OF SAN FRANCISCO, CALIFORNIA.

NAIL OR RIVET FOR BOOTS OR SHOES.

SPECIFICATION forming part of Letters Patent No. 382,072, dated May 1,1888.

Application filed January 20, 1887. Renewed October 7,1887. Serial No.251,769.

To aZZ whom it may concern.-

Be it known that I, G. ANDREA CAVALLI, a citizen of the United States,residing in the city and county of San Francisco, and State ofCalifornia, have invented certain [few and useful Improvements in Nailsor Rivets for Boots and Shoes; and I do hereby declare that thefollowing is a full, clear, and exact description of my said invention,reference being had to the drawings that accompany and form part of thisspecification.

The object of my invention is to produce a nail or rivet for unitingsoles and uppers in boots and shoes which shall possess the qualities ofdriving well and of holding in the leather and forming a firm anddurable fastening.

It consists in the novel form and construction of nail or rivet with athreaded body and intersecting longitudinal ribs, as hereinafter fullydescribed and pointed out.

In the drawings herein referred to, Figure 1 is a view,greatl ycnlarged,of the nail or rivet. Fig. 2 is a cross-section at any pointthrough the body. Fig. 3 is a sectional view of three die-rollers usedfor forming the nail with three longitudinal ribs. Fig. 4 is a sectionalview of four die-rollersfor making the nail with four longitudinal ribs.Any number of these ribs may be formed, according to the number ofrollers used.

A is the body of the nail, having the same (No model.)

that project radially and for the whole length of the body from betweenthe threads as well as over them. These ribs, being arranged at equaldistance apart around the body, divide the threaded surface from end toend into sections, and their edges, being presented beyond thethread,meet and cut into the material first,

set as shown in Figs. 3 and 4. The'number of 5 5 these dies employedwill govern the number of ribs or webs upon the nail, as will beunderstood from the above figures in the drawlngs.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

1. The herein-described nail or rivet,having a thread, a, andlongitudinal ribs 1) b, projecting beyond the thread.

2. The herein-described nail or rivet, having thethread a and thelongitudinal ribs 12 1), extending beyond thethread, a flattened end, A,having threads on its sides, as shown.

G. ANDREA OAVALLI. [L s.]

Witnesses:

J OHN L. TAGGARD, WM. MAYER.

